Division of Cardiology, Department of Internal Medicine, Kyung Hee University College of Medicine, Kyung Hee University, Seoul, Republic of Korea. Department of Medical Nutrition, Graduate School of East-West Medical Science, Kyung Hee University, Yongin 447-701, Republic of Korea; Research Institute of Medical Nutrition, Kyung Hee University, Seoul 130-701, Republic of Korea. Division of Endocrinology, Department of Internal Medicine, Kyung Hee University College of Medicine, Kyung Hee University, Seoul, Republic of Korea. Department of Food and Nutrition, Changwon National University, Changwon, Republic of Korea. Division of Cardiology, Department of Internal Medicine, Kyung Hee University College of Medicine, Kyung Hee University, Seoul, Republic of Korea. Electronic address: mylovekw@hanmail.net.